    [:div
     {:width "100%"
      :style
-     {:position "absolute" :left 0 :top 0 :height "1em"}}
+     {:position "absolute" :left 0 :top 0 :height "12px"}}
     (let [complexity (rx (str (let [n* @n n* (+ 1 (* 2 n*))] (* n* n*))))]
      [:span (rx (str @mouse-x ", " @mouse-y))
       ". n = " (rx (str @n)) " "

      " DOM attributes updated per second."])]
   [:svg/svg
   {:width "100%" :height "100%"
     :style {:position "absolute" :left 0 :top "1em"}}
   (circle mouse-x mouse-y)
    (let [ease-x (animation/easer 0.0)
          ease-y (animation/easer 0.0)]

                            (animation/start-easer! ease-y 0.0 1.0 1000 animation/quad-out cb))
                 :on-hide (fn [x cb]
                            ;(println "hiding")
                            (animation/start-easer! ease-x 1.0 0.0 1000 animation/quad-out cb)
                            (animation/start-easer! ease-y 1.0 0.0 1000 animation/quad-in cb))})))
        (fn [x]                                             ;;(println "captured" x)
          )
        (fn []                                              ;;(println "invalidated")
